Injection nozzle



April 15, 1930.

A. E. L.. cHoRLToN INJECTION NozzLE Filed March 21,1928

wlTNEssEs iPatented Apr. 15, 1930 ALAN ERNEST LEOFRIC CHOBLTON, FLONDON, ENGLAND INJECTION NOZZLE Application led March 21, 1928. SerialNo. 263,419.

ders and it has for its object to provide improved mounting meanstherefor, whereby an injection vdevice ,maybe quickly mounted anddemounted without disturbance of its component parts.

With injection devices of the character refer-red to, it is desirablethat the nozzles or injection devices be occasionally removed forcleaning. In my application Serial No. 263,418, filed Mar. 21, 1928, Ihave disclosed and claimed a unitary type of nozzle construe tionwherein the parts are so arranged that the construction maybe .takenapart and cleaned and reassembled with the preservation of the originalspring setting 'and limit of valve lift, the maintenance of these adeingdesirable for best atomization of fuel and combustion.` It isadvantageous to have an engine provided with spare nozzle or injectiondevices, so that one may be replaced whenever required. In accordancewith my present invention, I rovide improved mounting means forfacilitating the installation and' removal of fuel injection devices ornozzles'.

lThese and other objects are effected by my invention as will be aparent fromv the following description an claims taken in connectionwith the accompanying drawings,

,forming part of this application, in which Fig. 1 is a view showing aninjection nozzle and its mounting means in side elevation with afragment of an engine cylinder shown in section;

Fig. 2 is a top plan view of the apparatus shown in Fig. 1; and

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Fig. 3 is a vertical sectional view of the fuel injection device takenalong the lineIII-III ofFig. 1 and viewed `in the direction of thearrows. 4

Referring now to the drawings and to so muchof the fuel injection nozzleas will give a clearer understanding of the mounting means, in Fig. 3, Ishow a nozzle, at 10, in cluding a body 11 having an arial bore 12ustments, after having been carefully made,

joined by a conical seat 13 to a threaded counterbore 14. A nozzle tip15 is secured to the inner end of the body, the tip having an inletpassage 16 separated by a seat 17 from the. discharge passa e 18.

A barrel mem er 19 has an outer flange 20 having a conical seat 21 fttinthe Seat 13, a short portion 22 ttin the major portion 23 of sma lerdiameter than the bore 12 and providing, with the latter, a passageway24 leading to the tip inlet assage 16. The barrel member is provideldwith an axial bore 26 withinwhich there is arranged a valve stem 27,having a lower portion 28 of reduced diametenprovided with a c'onical orneedle valve 29 cooperating with the seat 17.

Liquid fuel is supplied under suitable pressure to the passage.30 in thebody and rom .which it passes to the passageway 24 and enters the inletpassage 16 of the tip, the pressure of fuel acting on the piston face 32to raise the valve 29 to a predetermined extent and against apredetermined pressure, as will be described immediately.

A sleeve 33 is threaded within the counter- `bore 14 and it has itslower .end abutting the liange 20, clam ing the latter so that theconical seat 21 ts closely the seat 13. The sleeve encloses a spring 34having its lower end abutting a flange 35 on the valve stem 27. Abushing 36 isthreaded tothe interior of the outer end of the sleeve l33and adjustable spacing means, for example, a shim ack 37, is interposedbetween the outer en of the spring and the bushing, whereby, when thebushing is screwed entirely home with respect to thesleeve with theiange 38 of the bushing abutting the outer end of the sleeve, apredetermined degree of compression w1ll exist in the spring..

As already pointed out, it is desirable to limit the lift; or degree ofopening, of the valve 29. To'this end, I show a stem 39 having its innerend closely spaced with respect to the outer end of the valve stem 27,the amount of clearance determining the extent of lift of the valve 29.The stem 39 is threaded interiorly of the bushing 36 and it has a fiange4:0 between which and the outer end of the bushing there is interposedadjustable 1 ore 12, and a spacing means, for example, a shim pack 41.As some fuel oil will escape by the parts to the sleeve 33, -I provide apassage 42 in the stem 39 and communicating with the lnipple 43 to whicha return line may be attached.

Having now described the fuel injection device, referred to its unitarcharacter, and pointed out how it may be ta en apart and reassembledwithout disturbing the predetermined spring setting or the valve lift, Iwill now describe my improved mounting means for the injection device,at 10. Referring now to Figs. 1 and 2, I show engine cylinder headstructure 45 having an opening 46 within which is arranged the tipclamping sleeve 47, the latter being provided with a flange 48 abuttingthe seat 49 disposed about the outer end of the opening 46.

Rotatable about the sleeve 33, there is a compression sleeve 51havingexterior threads 52 and a wrench engaging portion 53. A cross bar54 has a central opening 55 threaded to the sleeve 51 and it has arms56. provided with arcuate portions 57 arranged to engage the Shanks 58and underneath the heads 59 of stud bolts 60 connected to the cylinderstructure 45. y

If it is desired to remove the nozzle structure, at 10, a wrench isapplied to the portion 53 and the sleeve 52 is backed off sufficientlywith respect to the cross bar 54 to loosen the latter with respect tothe studs 60, whereupon the cross bar may be cleared of the studs andthe nozzle removed. When it is desired to replace a nozzle, the nozzleis inserted and the cross bar 54 turned to bring the arms 56 underneaththe heads 59 of the studs and then the sleeve 51 screwed down, the lowerend abutting the body l1 of the nozzle and gripping the latter withrespect to the seat 49 on the cylinder structure.

While I have described the nozzle, at 10, in detail, this has been donemerely to indicate the usefulness-of the mountin means.

1 It will be obvious that other types o nozzles may be used so long asthey may accommodate a compression -member cooperating with a memberanchored to the cylinder structure and capable of adjustment so as togrip or to hold the nozzle structure in compression with res ct to thecylinder structure.

hile I have shown my invention in but one form, it will be obvious tothose skilled in the art that it is not so limited, but is susceptibleof various changes and modifications, without departing from the spiritthereof, and I desire, therefore, that only such limitations shall beplaced thereupon asare imposed by the prior art or as are specificallyset forth in the appended claims.

What I claim is j 1. The combination with anengine cylin-` der having anopening for a fuel injection ting against the exterior of the cylinder,a second shoulder spaced outwardly from the first shoulder, and acylindrical portion extending outwardly from the second shoulder; andanchorage means for the nozzle including tension members carried by thecylinder, an abutment member held fixedly in place with respect to thecylinder by the tension members, and an adjustable sleeve surroundingsaid cylindrical portion, threaded to and movable With respect to saidabutment member, and having its inner end engaging said second shoulder.

2. The combination with an internal combustion engine cylinderliaving anopening and a seat for fuel injection means, of a fuel inj ection nozzlehaving an inner portion fitting against said seat for discharging fuelinto the cylinder, studs carried by the cylinder and disposed atopposite sides of said opening and provided with outer overhanging fixedabutments, a member having portions engageable underneath anddisengageable with respect to said abutments, and adjustable compressionmeans cooperating with said member and with the nozzle to clampl thelatter in place with respect to said seat.

3. The combination with an internal combustion engine cylinder having anopening and a seat for fuel injection means, of a fuel injection nozzlehaving an inner portion fitting against said seat for discharging fuelinto the cylinder, studs carried by the cylinder and disposed atopposite sides of said opening and provided vwith outer overhangingfixed abutments, a member having a portion encompassing the nozzle andportions engageable underneath and disengageable with respect to saidabutments, and adjustable compression' means cooperating With saidmember and with the nozzle to clamp the latter in place with respect tosaid seat.

4. The combination with an internal combustion engine cylinder having anopening and a seat for fuel injection means, of a fuel injection nozzlehaving an inner portion tting against said seat for discharging fuelinto the cylinder, studs carried by the cylinder and disposed atopposite sides of said opening and provided with oppositely directedfixed abutments, a member having a portion encompassing the nozzle andportions engageable underneath and disengageable with respect to saidabutments by angular movement, and adjustable compression meanscooperating with the encompassing portion of said member and with thenozzle to clamp the latter in place with respect to said seat.

5. The combination with an internal combustion engine -cylinder lia-vingan opening and a seat for fuel injection means, of a fuel injectionnozzle having ari inner portion fitting against said Seat fordischarging fuel into the cylinder, studs carried by the cylinder anddisposed at opposite sides of said ipso opening and provided with outerand oppositely directed fixed abutments and inner and adjacent roundshanks, a member having a portion encompassing the nozzle and havingoppositely directed portions provided with concave seats fitting theshanks and engageable underneath and disengageable with respect to saidabutments by angular movement of the member, and adjustable compressionmeans cooperating with the encompassing portion of the member and withthe nozzle to clamp the latter in place with respect to said seat.

6. The combination with an internal combustion engine cylinder having anopening and a seat for fuel injection means, of a fuel injection nozzlehaving an inner portion fitting against said seat for discharging fuelinto the cylinder, studs carried by the cylinder and disposed atopposite sides of said opening andprovided with outer overhangingabutments, a member having a portion encompassing the nozzle andportions engageable underneath and disengageable with respect to saidabutments, and threaded means cooperating with thev encompassing portionof said member and with' the nozzle for clamping the latter in placewith respect to said seat.

7. The combination with an internal combustion engine cylinder having anopening and a seat forfuel injection means, of a fuel injection nozzlehaving an inner portion fitting against said seat for discharging fuelinto the cylinder, studs carried by the cylinbustion engine cylinderhaving va smoothwalled opening and a seat surrounding the opening, of afuel injection nozzle having an inner tip portion fitting the openingand prof vided with a fiange fitting said seat, said nozzle having anoutwardly facing abutment spaced outwardly from said flange, a pair ofstuds carried by the cylinder and having oppositely directed overhangingabutments, a cross member having a portion encompassing the nozzleoutwardly of said outwardly fac-` der and disposed at opposite sides ofsaid 4 opening and provided with outer overhanging abutments, a memberhaving a portion encompassing the nozzle. and having portions engageableunderneath and disengageable with respect to said abutments, and asleeve surrounding the nozzle'and'threaded to the' encompassing port-ionof said member for clamping the nozzle 1n place With respectto Saidseat.

8. The combination with an internal comting against said seat fordischarging fuel' into the c linder, a pair of studs carried by thecylin er and disposed at opposite sides of said opening and providedwith oppositely l directed outer overhanging abutments, a v

cross member having a portion encompassing the nozzle and provided withoppositely directed portions vengageable underneath and disengageablewith respect to said abutments by angular movement of the cross member,

and a sleeve surrounding the nozzle and having threaded engagement withrespect tof the encompassing portion of said cross member for clampingthe nozzle in place with respect to said seat.

9., The combination with an internal com-

